11 February 2014

Africa: Measles Cases Drop Sharply, but Eradication Goal a Challenge

press release

Washington — Intensified efforts to conduct broad immunization campaigns have prevented almost 14 million deaths from measles worldwide since 2000, according to a new global report prepared jointly by U.S. and World Health Organization (WHO) experts.

About 145 million children received measles vaccines from 2000 to 2012, resulting in a 77 percent decrease worldwide in the incidence of the highly contagious viral disease. Reported cases declined from 146 cases per million people to 33 per million.

The number of fatal cases decreased by a similar proportion, 78 percent, with the more than 560,000 measles deaths reported in 2000 down to 122,000 by 2012.

Published by the U.S. Centers for Disease Control and Prevention (CDC) February 7, the report on the control and elimination of measles described disease occurrences in most regions as "historic lows."

Saved lives and less disease are certainly achievements, but these improvements are not great enough to achieve complete measles eradication by 2015.

The World Health Assembly, with membership of 194 nations, declared a goal in 2010 to deliver routine measles vaccination to more than 90 percent of 1-year-old children.

The analysis prepared by the World Health Organization's Strategic Advisory Group of Experts (SAGE) finds that routine immunization is reaching about 84 percent of these youngsters and has remained stuck at that level for four years.

Achieving eradication by 2015 would also call for measles incidence to remain at fewer than five cases per million. The incidence level recorded in 2012 fell well short of that goal.

Creating yet greater distance to the goal, 2012 might have been a temporary low in the cycle of measles incidence, the experts say, with another spike to occur in the near future. To remain on pace to defeat measles, national public health agencies must reach more than 95 percent of children with initial vaccines and booster vaccines.

Further, they must have the capability to conduct supplemental vaccination campaigns to catch youngsters missed in the first round. And they need to maintain that level of vaccination coverage year after year.

The experts see that as a stretch for many countries, one that "will require substantial and sustained additional investments of financial and human resources to strengthen health systems and achieve equitable access to immunization services."

The SAGE experts conclude "that the 2015 global targets and regional elimination targets [in Europe, the Eastern Mediterranean and Africa] will not be achieved on time."

The scale-up in immunization activity in recent years has been conducted under the Global Vaccine Action Plan, a collaborative effort of WHO, UNICEF, the Bill & Melinda Gates Foundation, the GAVI Alliance, the U.S. National Institute of Allergy and Infectious Diseases and the African Leaders Malaria Alliance.

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